Digital to Analogue Converters

Digital to analogue converters (also known as DACs) are devices that convert digital signals (e.g. a fixed-point binary number) into an analogue output signal (e.g. a physical quantity, such as voltage or pressure) for other devices to recognise. DACs are mostly in the audio industry, where they are used to convert digital audio signal (binary code) into an analogue signal ready for the next device or headphone amplifier to pick up. The reverse operation (analogue to digital conversion) can be performed by an ADC (analogue to digital converter). We have a curated range of DACs featuring products from well-known brands within the industry, including Analog Devices, Maxim Integrated, Microchip, Texas Instruments, and more.

What does a digital to analogue converter do?

Audio digital to analogue converters capture high-quality digital audio and convert it into a direct line level output analogue signal. An example of this is when digitally-stored music, such as an mp3 track or a CD, is converted into an analogue signal in order to be played through speakers. Video digital to analogue converters operate on a much larger scale and are high-frequency, low- to medium-resolution type converters. They are used to convert digital video data into analogue video signals, especially when using older models of monitors or televisions.

Types of digital to analogue converters

  • R-2R Ladder DACs - These converters are binary converters that use repeating cascaded resistor values R and 2R. Using R-2R improves accuracy.
  • Switched Capacitors - Switched capacitors include a parallel capacitor network.
  • Switched Resistors - Contain a parallel resistor system in which resistors are enabled or bypassed depending on the digital signal.
  • Switched Current Source - Different current sources are chosen based on the digital signal being input.

Applications

Digital to analogue converters are widely used in applications across audio and video industries, including mobile phones, televisions, music players, and telephone calls.

Converters for audio applications include:

  • Digital music systems when played through speakers or headphones
  • PC sound cards
  • ,li>Telecommunications

Video digital to analogue converters have application uses in:

  • Mobile phones
  • TVs

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    Description Price Architecture Resolution Conversion Rate Full Scale Error Integral Nonlinearity Error Number of DAC Channels Mounting Type Package Type Pin Count Maximum Settling Time Digital Interface Type Output Polarity Voltage Reference Power Supply Type
    RS Stock No. 806-5507
    Mfr. Part No.AD5781BRUZ
    £37.97
    Each
    Units
    R-2R, Resistor String 18 bit - ±5.25LSB ±0.5LSB 1 Surface Mount TSSOP 20 1µs Serial (SPI) Bipolar External, Internal Dual
    RS Stock No. 759-0819
    Mfr. Part No.AD5663ARMZ
    £6.53
    Each
    Units
    Resistor String 16 bit 220ksps ±1%FSR ±16LSB 2 Surface Mount MSOP 10 7µs Serial (SPI) Bipolar External, Internal Single
    RS Stock No. 165-1905
    Mfr. Part No.MCP4726A1T-E/CH
    BrandMicrochip
    £0.556
    Each (On a Reel of 3000)
    Units
    Resistor String 12 bit - 82LSB 14.5LSB 1 Surface Mount SOT-23 6 6µs Serial (I2C) Bipolar External Single
    RS Stock No. 169-8392
    Mfr. Part No.CS43L22-CNZ
    £3.009
    Each (In a Tube of 100)
    Units
    Delta Sigma 24 bit 96ksps - - 1 Surface Mount QFN 40 - Serial Bipolar Internal Single
    RS Stock No. 162-4995
    Mfr. Part No.DAC081S101CIMK/NOPB
    £0.484
    Each (On a Reel of 1000)
    Units
    Resistor String 8 bit - -1%FSR ±0.75LSB 1 Surface Mount TSOT 6 5µs Serial (SPI/QSPI/Microwire) Unipolar External Single
    RS Stock No. 916-3699
    Mfr. Part No.MCP48FVB22-E/UN
    BrandMicrochip
    £1.788
    Each (In a Pack of 5)
    Units
    Resistor String 12 bit - 70LSB 6LSB 2 Surface Mount MSOP 10 7.8µs Serial (SPI) Bipolar Internal Single
    RS Stock No. 645-3696
    Mfr. Part No.DAC0800LCM/NOPB
    £1.60
    Each (In a Pack of 5)
    Units
    Current Steering 8 bit - ±1LSB ±0.19%FSR 1 Surface Mount SOIC 16 0.15µs Parallel Unipolar External Dual
    RS Stock No. 669-6307
    Mfr. Part No.TC1320EOA
    BrandMicrochip
    £1.092
    Each (In a Pack of 5)
    Units
    Current Steering 8 bit - ±3%FSR ±2LSB 1 Surface Mount SOIC 8 10µs Serial (I2C) Unipolar External Single
    RS Stock No. 732-1635
    Mfr. Part No.DAC7568IAPW
    £7.56
    Each
    Units
    Resistor String 12 bit - ±0.2%FSR 1LSB 8 Surface Mount TSSOP 14 10µs Serial (SPI) Unipolar Internal Single
    RS Stock No. 806-5428
    Mfr. Part No.AD5684RBRUZ
    £9.23
    Each
    Units
    Resistor String 12 bit - ±0.2%FSR ±1LSB 4 Surface Mount TSSOP 16 7µs Serial (SPI) - Internal Single
    RS Stock No. 145-5919
    Mfr. Part No.DAC7802KU
    £14.06
    Each (In a Tube of 25)
    Units
    R-2R, Resistor String 12 bit 1.25Msps ±3LSB ±1LSB 2 Surface Mount SOIC 24 0.8µs Parallel - External Single
    RS Stock No. 165-4795
    Mfr. Part No.TC1320EOA
    BrandMicrochip
    £0.882
    Each (In a Tube of 100)
    Units
    Current Steering 8 bit - ±3%FSR ±2LSB 1 Surface Mount SOIC 8 10µs Serial (I2C) Unipolar External Single
    RS Stock No. 738-7124
    Mfr. Part No.MCP4716A0T-E/CH
    BrandMicrochip
    £0.652
    Each (In a Pack of 5)
    Units
    Resistor String 10 bit - 20.5LSB 3.625LSB 1 Surface Mount SOT-23-6 6 6µs Serial (I2C) Unipolar External Single
    RS Stock No. 697-6938
    Mfr. Part No.AD5752RBREZ
    £16.46
    Each
    Units
    Resistor String 16 bit 1.07Msps ±0.05%FSR ±16LSB 2 Surface Mount TSSOP 24 10µs Serial (SPI/QSPI/Microwire) Bipolar, Unipolar External, Internal Dual, Single
    RS Stock No. 709-4796
    Mfr. Part No.AD5662ARMZ-1
    £5.07
    Each
    Units
    Resistor String 16 bit 1.2Msps ±1.5%FSR ±32LSB 1 Surface Mount MSOP 8 10µs Serial (SPI/QSPI/Microwire) Unipolar External Single
    RS Stock No. 738-6682
    Mfr. Part No.MCP4821-E/SN
    BrandMicrochip
    £1.915
    Each (In a Pack of 2)
    Units
    Resistor String 12 bit - ±2%FSR 12LSB 1 Surface Mount SOIC 8 4.5µs Serial (SPI) Bipolar Internal Single
    RS Stock No. 506-1741
    Mfr. Part No.LTC2622CMS8#PBF
    £5.71
    Each
    Units
    - 12 bit - ±0.7%FSR ±4LSB 2 Surface Mount MSOP 8 7µs Serial (SPI/Microwire) Unipolar External Single
    RS Stock No. 522-9969
    Mfr. Part No.DAC8420FPZ
    £54.09
    Each
    Units
    - 12 bit 125ksps ±8LSB ±4LSB 4 Through Hole PDIP 16 13µs Serial (SPI) Bipolar, Unipolar External Dual, Single
    RS Stock No. 889-5301
    Mfr. Part No.MCP4716A0T-E/CH
    BrandMicrochip
    £0.473
    Each (On a Reel of 3000)
    Units
    Resistor String 10 bit - 20.5LSB 3.625LSB 1 Surface Mount SOT-23-6 6 6µs Serial (I2C) Unipolar External Single
    RS Stock No. 651-1988
    Mfr. Part No.DAC081S101CIMK/NOPB
    £1.132
    Each (In a Pack of 5)
    Units
    Resistor String 8 bit - -1%FSR ±0.75LSB 1 Surface Mount TSOT 6 5µs Serial (SPI/QSPI/Microwire) Unipolar External Single